1213323331 has 12 divisors (see below), whose sum is σ = 1342591992. Its totient is φ = 1087436000.

The previous prime is 1213323247. The next prime is 1213323343. The reversal of 1213323331 is 1333233121.

It is not a de Polignac number, because 1213323331 - 2¹⁷ = 1213192259 is a prime.

It is a super-2 number, since 2×1213323331² = 2944307011097871122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213320331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44511 + ... + 66391.

It is an arithmetic number, because the mean of its divisors is an integer number (111882666).

Almost surely, 2^1213323331 is an apocalyptic number.

1213323331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213323331 is a deficient number, since it is larger than the sum of its proper divisors (129268661).

1213323331 is an equidigital number, since it uses as much as digits as its factorization.

1213323331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22034 (or 21963 counting only the distinct ones).

The product of its digits is 972, while the sum is 22.

The square root of 1213323331 is about 34832.7910308663. The cubic root of 1213323331 is about 1066.5769231897.

Adding to 1213323331 its reverse (1333233121), we get a palindrome (2546556452).

The spelling of 1213323331 in words is "one billion, two hundred thirteen million, three hundred twenty-three thousand, three hundred thirty-one".